Stadium: Court 8 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Nonthaburi | 2019/07/24 02:00 | Daisuke Sumizawa v Sergey Fomin | 3-6,1-6 |
| ITF M25 Nonthaburi | 2019/07/23 03:45 | Daisuke Sumizawa v Krittin Koaykul | 6-4,1-6,11-9 |
| ITF M25 Nonthaburi | 2019/07/22 08:50 | Daisuke Sumizawa v Saranpong Borisutpong | 6-2,6-4 |
| ITF M25 Qujing | 2019/07/11 03:20 | Rio Noguchi v Daisuke Sumizawa | 6-3,6-0 |
| ITF M25 Qujing | 2019/07/09 04:30 | Zhuoyang Qiu v Daisuke Sumizawa | 1-6,0-6 |
| ITF M25 Kunshan | 2019/07/04 03:10 | Daisuke Sumizawa v Haitong Xia | 3-6,6-4,3-6 |
| ITF M25 Kunshan | 2019/07/02 10:35 | Pol Wattanakul v Daisuke Sumizawa | 1-6,6-2,3-6 |
| ITF M15 Anseong | 2019/06/25 02:45 | Uisung Park v Daisuke Sumizawa | 6-4,3-6,6-2 |
| ITF M25 Qujing | 2019/07/08 02:00 | Hao Yuan Ng v Chuhan Wang | 1-6,0-6 |
| Davis Cup | 2019/06/29 04:10 | Hao Yuan Ng v Shahin Khaledan | 6-4,6-7,6-7 |
| Davis Cup | 2019/06/28 04:15 | Harshana Godamanna v Hao Yuan Ng | 6-2,6-3 |
| Davis Cup | 2019/06/27 03:55 | Nam Hoang Ly v Hao Yuan Ng | 6-1,6-1 |
| Davis Cup | 2019/06/26 05:25 | Mohammad Ghareeb v Hao Yuan Ng | 7-5,4-6,6-2 |
| ITF M15 Singapore | 2019/06/12 04:40 | Hao Yuan Ng v Jonathan Gray | 0-6,6-4,2-6 |
| ITF M15 Singapore | 2019/06/04 02:00 | Alec Adamson v Hao Yuan Ng | 6-3,6-3 |
| ITF M15 Singapore | 2019/05/30 03:15 | Hao Yuan Ng v Manish Sureshkumar | 1-6,2-6 |